问题

The study addresses the unexplored patterns and mechanisms governing the global interconnection of peak river discharge across spatially distant locations. It investigates the amplified societal and environmental impacts of simultaneous floods across multiple regions.

方法

The study uses a global annual peak discharge database from 4,407 observational hydrometric stations. It employs complex network methodology to reveal global coupling patterns and examines synchronization of peak river discharge among watersheds.

关键发现

The research identifies hubs for remotely linked discharge peaks and reveals increasing trends in remotely linked watersheds since the 1980s. Ocean-atmosphere oscillations dictate the global coupling pattern and temporal evolution of discharge peaks.

3个要点

• Global peak river discharge synchronization has amplified since the 1980s, indicating increased interconnectedness of flood events.
• Ocean-atmosphere oscillations play a crucial role in dictating the global coupling pattern and temporal evolution of discharge peaks.
• The findings can benefit coordinated flood risk management and inform strategies to strengthen societal resilience against riverine flood risks.